Ore-concentrator.



LUTHER LOOK, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO THE NEW STANDARD OONOENTRATOR OO., OF SAME PLACE.

ORE-CONCENTRATOR.

SPECIFICATION forming part 0f Letters'atent No. 678,793, dated July 16, 1901. Application iil'edAugut 14, 1900. Renewed Tune 22,190.1. Serial No. 65,692. (No model.)

To all whom t may concern:

Beit known that I, LUTHER LOOK, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Ore-Ooncentrators, of which the following is a specification.

The object of this invention is to provide superior means for separating the heavy mineral from the light portions of the ore.

My present invention more particularly relates to the construction of the concentratingtable and the combination thereof with the means for moving the table. Various means may be employed for operating the table, and in the accompanying drawings I have only indicated such means in a general way.

The accompanying drawings illustrate my invention.

Figure I is a front elevation of a machine embodying my invention. Fig. II is a plan view of my newly-invented concentrating-table. Fig. III is a section of the table on line III III, Fig. II, diagonally across the table and alongside a row of rifles. Fig. IV is a section on line IV IV in a larger scale.

a indicates the table, which is swung from a frame 7 by links f g and slopes from the feed end o of the table to the discharge end 47 and also slopes from the percussion side a to the power side a.

25 indicates a cam to operate a lever 26 to operate the spring-balanced table c. The table-operating mechanism is not claimed in this application, for the reason that it is described and claimed in aseparate application, Serial No. 26,887, tiled August 14, 1900, and pending in the United States Patent Oflice contemporaneously herewith.

7l, 72, 73, 74C, and 75 indicate riiiles of different thicknesses or depths, respectively, arranged coaXially-. e., endwise relative to each other in rows or lines extending diagonally across the table from the power side toward the percussion side and discharge end at a slant of about one inch in twelve. The

rifiies of each of these diagonal crosswise rows of coaxial riffles' are set at a slight dist-ance apart to leave communicating channels 76 between the abutting ends of the riliies, respectively. 'The ends 77 78 of each of the riftles are beveled substantially in parallel lines, so that the front end 77 of each riftle is beveled on the side which is away from the feed end of the table, and the other end 7S is beveled on the side which is toward the feed end o of the table. By this means the channels 76 between the abutting ends of the riflies of any of said rows extend from the lower or power side of the table a toward the upper or percussion side c thereof and away from the discharge end L t7 of the table. vThe table slopes from the feed end 'u' toward the discharge end 47 and also from thepercussion side a toward the power side o.

53 indicates a clear-water pipe extending along the percussion side of the table to feed clear water ontothe plain portion of the table.

The arrow 8O indicates the direction of maximum slope of the table-that is to say, the direction in which the clear water would flow across the table if the table were at rest and devoid of riiiies.

The arrow 8l indicates the path and direction of the table as it moves toward the percussion side to produce the bump.

The arrows 82 indicate the general course of the pulp when the table is in operation.

The arrows 83 indicate the general course of the heavy mineral on the riflie portion of the table when the table is in operation.

The arrows 84: indicate the course ofthe mineral separated from the lighter material.

The riffles 7l at the percussion side of the table are preferably of slight height,sayabout one-sixteenth of an inch or slightly more. The 'riflies 7l are also preferably arranged sidewise parallel with each other in a row extending from the feed end o of the table to the discharge end 47 along the line which is oblique to the direction of every force at work in the table-that is to say, oblique to the direction of bump and to the courses the pulp and the clear water would flow in if free to act alone. This line is determined from the resolution of the forces at work and extends in the direction indicated by arrows S2, in which the lighter material travels when the tableisinoperation. rlhisisdiagonallyacross the lines of greatest slope of the table and toward the percussion side of the'discharge end.

IOO

The rifiies 72 are slightly thicker than the riftles 71 and are arranged sidewise parallel with each other in an oblique row, corresponding to the row in which the riflies 71 are arranged. The riflies 73 are slightly thicker than the riffles 72 and are arranged parallel with each other in oblique rows. The rifiies 74 and 75 are arranged in a similar manner, each being thicker thanthe preceding in the order named, so that in the preferred form the riffles 75 are about one-half to five-eighths of an inch in thickness. By this arrangement the surface of the table is furnished with channels 79, which extend obliquely across the table, slanting from the power side a" toward the plain discharge-way at a', percussion side, and toward the discharge end 47 of the table. These channels 79 intercommunicate with each other through the channels 76.

91 indicates riffles in the channels 79 between the endwise rows of riffles. These rifiles 91 are-substantially of the same height as the rifiles 7l, so that their top faces are below the level of the riffles 72, 73, 74, and 75. The riffles 91 are arranged parallel with the riffles 71 72, &c., and are pointed at the ends and are set with slight spaces 92 between the ends of theseveral riffies to form in the channels 79 communicatingchannels corresponding to the channels 76, but oifset or stepped with relation to such channels 76. Preferably the channels 76 and the channels 92 are in alinement with each other in diagonal rows, as clearly shown in Fig. II, which extend from the power side toward the percussion side upwardly toward the feed end of the table in lines corresponding to the bevels of the ends of the riffles. These lines extend upwardly in a slight measure diagonally of the direction of the bump-that is to say, diagonally of the path of the table.

The purpose of the shallower riffles 91 is to prevent sluicing across the channels 79 and through the communicating channels 76. Another use of the intermediate shallow rifiles 91 is to catch the mineral at the bottom and direct it toward the percussion side of the table and at the same time to allow the light-er material to pass freely down the table toward the discharge end of the 'table and to iiow through the communicating channels 76. By the provision of theintercommunicating channels 7 9 and 76 the capacity of the table for freeing itself of the lighter material is greatly increased, and by the use of the offset shallow riflies 91 any sluicing action through the communicating channels 76 does not operate to carry the mineral down through said channels 76.

By operating the table in the path indicated by the arrow 81 diagonally of the riffles the action of the table causes the mineral to move along the line of the communicating channels 76 and to throw the mineral toward the lower side of the several rifies, and in actual 'practice the mineral travels beneath the lighter material up throughV the communicating channels 76 and 92 between the ends of the riffles and against the course of both the pulp and the clear water and issues onto the plain discharge-way of the table at a from a channel which is nearer the feed end of the table than the channel in which the mineral finally reached the face of the table. By this construction and arrangement of the machine the silica and lighter portions of the pulp are carried down the table with great freedom and rapidity and without disturbing the course of the mineral toward the percussion side of the table. The mineral after it has reached the plain space of the table at the percussion side a moves downward along said space under the combined action of the v percussion and the clear water and discharges at the percussion side of the discharge end of the table.

93 indicates a tapering eqnalizing cleat at the discharge end of the table to preserve a practically level discharge surface and to prevent the water from escaping too freely from the lower or power side of the table.

The riflies in each endwise or coaxially arranged row extend at such a slant relative to the slope of the'table and to the depths of the riiiies that the tops of all the riffles in any one row of coaxial riffles will substantiallybe on one level. This arrangement causes an even action and iiow of the material over the rifiied surface.

op indicate the pumping-beams, fastened to the table, and 5 6 indicate the posts against which said beams bump. 4

19 indicates a spring, and 25 26 indicate a cam and a lever which serve as means for operating the table.

94 indicates the table-top, and 95 the linoleum or canvas cover for the same, which is bent down over the front member 96 of the frame and clamped by the strip 97 and is bent up at the sides and fastened by the side pieces 54 and 57, respectively. g

In practical operation the sharp points 77 and 78 of the riffles avoid any undesirable agitation or stirring of the pulp by the ends of the rifies, which otherwise might occur when the table is in operation.

What I claim, and desire to secure by Letters Patent of the United States, is-

1. An ore-concentrator comprising a table having in its surface main channels which have a substantially common direction and channels communicating between the main channels; and means for shaking the table diagonally of the main channels.v

2. An ore-concentrator comprising a table having in its surface parallel main channels and communicating channels connecting said parallel channels; and means for shaking the table diagonally of the main channels.

3. An ore-concentrator comprising a table having in its surface parallel main channels IOO IIO

and oblique communicating channels connecting the parallel main channels; and means for shaking the table diagonally of the main channels.

4. An oreconcentrator comprising a table havingaslanting surface furnished with main channels arranged at an angle to the slope of said surface; and communicating channels extending between the main channels; and means for shaking the table diagonally of the main channels.

5. An ore-concentrator comprising a table having a slantin g surface furnished with main channels arranged at an an gie to the slope of said surface; and communicating channels extending obliquely between thepmain channels; and means for shaking the table diagonally of the main channels.

6. An ore-concentrator comprising a table having a slanting surface furnished with main channels arranged at an angle to the slope of said surface, and communicating channels eX- tending upward obliquely between the main channels; and meansfor shaking the table diagonally of the main channels.

7. An ore-concentrator table having asian ting surface furnished with main channels arranged at an angle to the slope of said surface and extending obliquely down the table; communicating channels extending obliquely upward between the main channels; a discharge-way alongthe upper edge of the table; a pipe for feeding water at the upper edge of said way; and means for vibrating the table; the main channels at the side of the table opposite the discharge-way being deeper than the main channels at the discharge-way.

8. An ore-concentrator comprising a table furnished with rifles extending obliquely across the table and arranged coaxially in rows lengthwise of the riiiles, with open spaces between the ends of the riiiies, and being also arranged parallelly in rows extending obliquely from the feed end toward the discharge end of the table, with spaces between the sides of the riflies; and means for shaking the table diagonally of the rifles.

9. An ore-concentrator table furnished with short rifies arranged in rows coaXially of the riftles and also in parallel rows, and being of successively increasing heights from the percussion side of the table to the opposite side of the table and having spaces between the riffles, and a tapering, equalizing cleat at'the discharge end of the table, substantially as set forth.

10. An ore-concentrating table furnished with riffies pointed at the ends and spaced apart in rows coaxially and parallelly; and means for shaking the table diagonally ofthe rifles.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, at Los Angeles, California, this 2d day of August, 1900.

LUTHER LOOK.

Witnesses:

JAMES R. TowNsEND, JULIA To'WNsnND. 

